Method for recovering coal and cement raw materials from zinc hydrometallurgy rotary kiln slag

A technology for hydrometallurgy of zinc and cement raw materials, applied in chemical instruments and methods, wet separation, solid separation, etc., to achieve the effects of simple process flow, high yield and strong applicability

Inactive Publication Date: 2017-09-15
汉源县伟业环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this patent is that the use of a specific flotation device, such as a flotation column, is not a recovery method for the process flow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for recovering coal and cement raw materials from hydrometallurgy rotary kiln slag, comprising the following steps:

[0037] Grinding: first crush the slag of the zinc hydrosmelting rotary kiln with a crusher, and then use a ball mill to grind the crushed slag of the rotary kiln for zinc hydrosmelting to obtain pulp I, which is used in the rotary kiln for zinc hydrosmelting The mass fraction of the slag is 76%. The particle size of the wet zinc smelting rotary kiln slag in the slurry I is -35 mesh, accounting for 85%. The slurry I is then classified by a spiral classifier to obtain the slurry II;

[0038]Weak magnetic separation: Add water to the pulp II until the mass fraction of the wet-process zinc smelting rotary kiln slag in the pulp is 23%, and then send it into the weak magnetic separator for weak magnetic separation to obtain crude iron concentrate and weak magnetic separation tailings. The magnetic field strength of weak magnetic separation is 1600 Oer...

Embodiment 2

[0048] A method for recovering coal and cement raw materials from hydrometallurgy rotary kiln slag, comprising the following steps:

[0049] Grinding: first crush the slag of the zinc hydrosmelting rotary kiln with a crusher, and then use a ball mill to grind the crushed slag of the rotary kiln for zinc hydrosmelting to obtain pulp I, which is used in the rotary kiln for zinc hydrosmelting The mass fraction of the slag is 78%. The particle size of the hydrometallurgy rotary kiln slag in the slurry I is -35 mesh, accounting for 88%. The slurry I is then classified by a spiral classifier to obtain the slurry II;

[0050] Weak magnetic separation: add water to the pulp II until the mass fraction of the wet-process zinc smelting rotary kiln slag in the pulp is 24%, and then send it into the weak magnetic separator for weak magnetic separation to obtain crude iron concentrate and weak magnetic separation tailings. The magnetic field strength of weak magnetic separation is 1800 Oers...

Embodiment 3

[0060] A method for recovering coal and cement raw materials from hydrometallurgy rotary kiln slag, comprising the following steps:

[0061] Grinding: first crush the slag of the zinc hydrosmelting rotary kiln with a crusher, and then use a ball mill to grind the crushed slag of the rotary kiln for zinc hydrosmelting to obtain pulp I, which is used in the rotary kiln for zinc hydrosmelting The mass fraction of the slag is 80%. The particle size of the hydrometallurgy rotary kiln slag in the slurry I is -35 mesh, accounting for 90%. The slurry I is then classified by a spiral classifier to obtain the slurry II;

[0062] Weak magnetic separation: Add water to the pulp II until the mass fraction of the wet-process zinc smelting rotary kiln slag in the pulp is 25%, and then send it to the weak magnetic separator for weak magnetic separation to obtain crude iron concentrate and weak magnetic separation tailings. The magnetic field strength of weak magnetic separation is 1900 Oerste...

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Abstract

The invention relates to a method for recovering coal and cement raw materials from zinc hydrometallurgy rotary kiln slag. The method includes the following steps of ore grinding, weak magnetic separation, stirring, roughing and scavenging. The method is simple in process flow, high in applicability, low in machining cost, capable of obtaining two different coal products with high-order calorific value and high in yield, the remaining gangue meets the using requirement if iron content raw materials in cement plants, and resource comprehensive utilization is achieved.

Description

technical field [0001] The invention relates to a method for recovering coal and cement raw materials from zinc hydrometallurgy, more specifically, the present invention relates to a method for recovering coal and cement raw materials from zinc hydrometallurgy rotary kiln slag, which belongs to metallurgical slag recovery Take advantage of technical areas. Background technique [0002] In the process of zinc hydrometallurgy, a large amount of leaching slag will be produced, and most of the valuable metals except zinc are concentrated in the leaching slag. After the residual zinc is recovered in the way of rotary kiln calcination, the remaining rotary kiln slag is still Contains a lot of iron and carbon. Due to the lack of economically viable recycling technologies, most enterprises can only build dedicated solid waste storage yards to accumulate these rotary kiln slags, which not only increases the operating costs of the enterprises, but also occupies a large amount of land...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B9/04
CPCB03B7/00B03B9/04
Inventor 蒋朋钢于恒
Owner 汉源县伟业环保科技有限公司
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